嫂子的英文：
older brother's wife
sister-in-law

参考例句：

Wandering in the garden one day, he chanced upon his sister-in-law sketching with watercolors
一天，他漫步花园，碰巧看见嫂子在用水彩写生。

Two weeks later, my sister in law was dead.
两个星期以后，我的那位嫂子死去了。

"I came specially to see you, sister, and also to inquire after Her ladyship's health. "
原是特来瞧瞧嫂子你二则也请请姑太太的安.

I didn't dare come before because I was told you were very strict and took offence at the least little thing.
"只因素日闻得人说,嫂子是个利害人,在你跟前一点也错不得,所以唬住了我."

older是什么意思：
adj. old的形容词比较级；年长的

The older the wiser.
人老智慧多(姜还是老的辣)。

Older and wiser
越老越聪明

If you were older you might understand.
假如你年龄再大一点，你就会理解了。

brother是什么意思：
n. 兄弟；教友；同事；战友；同胞
int. 我的老兄

He has scrap with his brother.
他与他的哥哥打架。

My brother is a football maniac.
我哥哥是个足球迷。

My brother and she are engaged.
我兄弟和她订婚了。

wife是什么意思：
n. 已婚女子，妻子

Ann was cast as the wife.
安妮被选派扮演妻子的角色。

My wife was there among others.
我妻子和其他一些人在那儿。

The wife is the key of the house
妻子是家庭的关键